Alex (Sandy) Pentland leads the Human Dynamics research group and the Connection Science initiative at the MIT Media Lab and is the author of Honest Signals: How They Shape Our World (MIT Press). He is a pioneer in mobile information systems, technology for developing countries, consumer health, and smart environments. One of the most-cited computer scientists in the world, with international awards in the Arts, Sciences and Engineering, he was chosen by Newsweek as one of the 100 Americans likely to shape this century.